ABS 3D Printer Filament
ABS (Acrylonitrile Butadiene Styrene) is the second most popular 3D printing filament behind PLA. ABS is very cheap and also lightweight and durable. This makes it useful for some applications where PLA would not work.
ABS also has more flexibility over PLA. This makes it a perfect plastic for high stress parts such as quadcopter frames or printer parts. Rather than cracking and shattering ABS will bend and flex.
However, there are disadvantages to ABS that are very important when printing. Firstly, ABS can warp considerably. You must use a heated bed when printing with ABS other wise it will warp significantly when cooling down. Secondly, ABS needs printing at very high temperatures (260deg) which can place undue stress on most printers.
Importantly, ABS gives off toxic fumes when printing. This means that you must always print ABS in a well validated room. Serious illness can happen if this is not done.